Bats perform substantial ecological services, including insect consumption, pollination, seed dispersal, and nutrient cycling. Their low reproductive rates, and sensitivity to human disturbance makes bats vulnerable to a variety of threats including habitat loss and fragmentation, climate change, pesticides, toxic wastewater, wind farm development, and the fungal disease white-nose syndrome. With the help of the “Bat Brigade” wildlife volunteer group, the East Bay Regional Park District (EBRPD) conducted an 8-year study (2017 to 2024) of bat distribution, abundance, and calls per hour at three locations in Southern Alameda County. A total of 48 bat exit and acoustic surveys were conducted periodically between April and July at Sunol Wilderness Regional Preserve, Lake Del Valle Regional Park and Camp Arroyo Regional Recreation Area. The study confirmed the presence of 7 genera and 9 species of bats, including two (2) California Species of Special Concern, the Pallid Bat (Antrozous pallidus), and the Western Red Bat (Lasiurus blossevilli). Additionally, the acoustic sampling detected the following species in order of abundance: Yuma Myotis (Myotis yumanensis), Mexican Free-tailed Bat (Tadarida brasiliensis), and California Myotis (Myotis californicus). Lastly, this effort demonstrates the tremendous energy that more than 1,000 volunteers can bring to a wildlife conservation program as community scientists contributing more than 5,000 hours of supervised service annually.